Thames Valley Police released this CCTV image of three men they want to speak to in connection with the alleged assault

Two men, aged 23 and 24, from Bedford and a 26-year-old man from Loughborough were interviewed and released on Friday, officers said.

A spokesman for Thames Valley Police said: “Between 12am and 2.30am on Sunday, July 2, the victim, a woman aged in her 20s, left the Chinawhite enclosure at the Henley Regatta with a party of people whom she had met there.

“She walked to a residential street in the Harpsden Road and Reading Road area of the town to a car where she was subsequently raped outside the vehicle. The three men then left in the vehicle.

“A member of the public located the victim near the Three Horseshoes public house in Reading Road shortly before 2.30am and called police.

“Two men, aged 23 and 24, from Bedford and a 26-year-old man from Loughborough, have all been arrested on suspicion of rape in connection with this incident. They have been released under investigation.”

Detective Inspector Ali Driver said: “The victim is being supported by specially-trained officers at this time. If you have any information about this incident, please come forward and speak to officers as this could assist with our investigation.”